Generalized fractal dimensions of laser Doppler flowmetry signals recorded from glabrous and nonglabrous skin

Medical Physics
Benjamin BuardAnne Humeau

Abstract

The technique of laser Doppler flowmetry (LDF) is commonly used to have a peripheral view of the cardiovascular system. To better understand the microvascular perfusion signals, the authors herein propose to analyze and compare the complexity of LDF data recorded simultaneously in glabrous and nonglabrous skin. Glabrous zones are physiologically different from the others partly due to the presence of a high density of arteriovenous anastomoses. For this purpose, a multifractal analysis based on the partition function and generalized fractal dimensions computation is proposed. The LDF data processed are recorded simultaneously on the right and left forearms and on the right and left hand palms of healthy subjects. The signal processing method is first tested on a multifractal binomial measure. The generalized fractal dimensions of the normalized LDF signals are then estimated. Furthermore, for the first time, the authors estimate the generalized fractal dimensions from a range of scales corresponding to factors influencing the microcirculation flow (cardiac, respiratory, myogenic, neurogenic, and endothelial). Different multifractal behaviors are found between normalized LDF signals recorded in the forearms and in the hand palms...Continue Reading

References

Jul 1, 1991·Medical & Biological Engineering & Computing·R J Gush, T A King
Sep 1, 1991·Medical & Biological Engineering & Computing·H Deblén, P A Oberg
Sep 1, 1990·Journal of Medical Engineering & Technology
Jul 1, 1984·Medical & Biological Engineering & Computing·G E Nilsson
Sep 18, 1998·Bulletin of Mathematical Biology·M Bracic, A Stefanovska
Feb 1, 1986·Physical Review A: General Physics·T C HalseyB I Shraiman
Sep 15, 2001·Physiological Measurement·A StefanovskaH Haken
Mar 5, 2002·Proceedings of the National Academy of Sciences of the United States of America·Ary L GoldbergerH Eugene Stanley
Mar 8, 2003·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Shuji YanagimotoNarihiko Kondo
Mar 26, 2003·The Journal of Physiology·Ian C Roddie
Apr 8, 2003·American Journal of Physiology. Heart and Circulatory Physiology·Torbjörn SöderströmHenry Svensson
Jan 1, 1965·Annual Review of Physiology·A D GREENFIELD
Oct 15, 2003·Hypertension·Kosuke InokuchiAkira Takeshita
Mar 8, 2005·American Journal of Physiology. Heart and Circulatory Physiology·Thad E WilsonCraig G Crandall
Feb 9, 2006·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Roy Freeman
Jun 13, 2006·European Journal of Applied Physiology·Fumio Yamazaki, Ryoko Sone
Jul 21, 2006·Microvascular Research·Per KvandalKnut Arvid Kirkebøen
Mar 7, 2007·Medical & Biological Engineering & Computing·Anne HumeauTomas Strömberg
May 2, 2009·Schizophrenia Research·Jeannine PeupelmannKarl-Jürgen Bär
Jun 15, 1981·Applied Optics·R Bonner, R Nossal
Nov 5, 2010·Scandinavian Journal of Medicine & Science in Sports·J M Johnson

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.